Self-propelled jack-up vessel
First Claim
1. A self-propelled jack-up vessel, wherein a centerline extending from a bow end to a stern end of the vessel along a central longitudinal axis defines port and starboard sides of the vessel, and wherein the centerline substantially defines the direction of travel of the vessel, the vessel comprising:
- a hull, a deck and four retractable legs each fitted with a spud can to support the respective leg on a seafloor, the legs extending through the hull and the deck and arranged to be lowered onto the seafloor to support the vessel in an elevated position, including a bow leg arranged on the centerline towards the bow;
a stern leg arranged on the centerline towards the stern;
a port leg arranged at the port side;
a starboard leg arranged at the starboard side.
2 Assignments
0 Petitions
Accused Products
Abstract
A self-propelled jack-up vessel has a centreline extending from a bow end to a stern end of the vessel along a central longitudinal axis, defining port and starboard sides of the vessel. The vessel comprises a hull, a deck and four retractable legs, which extend through the hull and the deck. The vessel includes a bow leg arranged on the centreline towards the bow, a stern leg arranged on the centreline towards the stern, and a starboard leg arranged at the starboard side. The diagonal placement of the legs, with respect to the centreline gives greater stability and flexibility. Further, a vessel is provided having a cruciform primary structural arrangement.
15 Citations
20 Claims
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1. A self-propelled jack-up vessel, wherein a centerline extending from a bow end to a stern end of the vessel along a central longitudinal axis defines port and starboard sides of the vessel, and wherein the centerline substantially defines the direction of travel of the vessel, the vessel comprising:
- a hull, a deck and four retractable legs each fitted with a spud can to support the respective leg on a seafloor, the legs extending through the hull and the deck and arranged to be lowered onto the seafloor to support the vessel in an elevated position, including a bow leg arranged on the centerline towards the bow;
a stern leg arranged on the centerline towards the stern;
a port leg arranged at the port side;
a starboard leg arranged at the starboard side. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a hull, a deck and four retractable legs each fitted with a spud can to support the respective leg on a seafloor, the legs extending through the hull and the deck and arranged to be lowered onto the seafloor to support the vessel in an elevated position, including a bow leg arranged on the centerline towards the bow;
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12. A method of operating a jack-up wind turbine installation vessel comprising;
at a first installation location, jacking the vessel by; lowering a first pair and second pair of retractable legs onto the seafloor; applying a pre-load, maximally equal to the full weight of the vessel, on said first pair of retractable legs aligned with a first axis of the vessel; releasing the pre-load applied on the first pair of retractable legs; applying the pre-load on a second pair of retractable legs aligned with a second axis of the vessel, and releasing the pre-load applied on the second pair of retractable legs, wherein the first and second axes are centerline of the vessel and a beam of the vessel. - View Dependent Claims (13, 14, 15, 16)
- 17. A self-propelled jack-up vessel having a hull and a deck and a cruciform primary structure wherein the cruciform primary structure comprises a first member defining a centerline of the vessel and a second member defining a beam of the vessel, wherein the first members comprises at least one longitudinal structural bulkhead between the hull and the deck and the second member comprises at least one transverse structural bulkhead between the hull and the deck wherein a length ratio of the second member to the first member is more than 0.5 but less than 1.
Specification